Table 4.
Multivariate analysis for 6MWD in absolute value (m)
| Parameter | DF | Parameter estimate | SE | t value | Pr > |t| |
|---|---|---|---|---|---|
| Intercept | 1 | 100.46004 | 168.52394 | 0.60 | 0.5514 |
| Age | 1 | −3.22696 | 0.46779 | −6.90 | <0.0001 |
| Obesity | 1 | −24.05947 | 11.73060 | −2.05 | 0.0409 |
| Hypertension | 1 | −20.54332 | 9.78203 | −2.10 | 0.0363 |
| Diabetes | 1 | 33.89135 | 15.15119 | 2.24 | 0.0258 |
| FEV1% pred | 1 | 1.25108 | 0.25561 | 4.89 | <0.0001 |
| mMRC | 1 | −31.07953 | 4.65525 | −6.68 | <0.0001 |
| SpO2 at rest | 1 | 5.17758 | 1.73057 | 2.99 | 0.0029 |
Note: Significant (P< 0.05) shown in bold.
Abbreviations: 6MWD, 6-min walking distance; mMRC, modified Medical Research Council scale for dyspnea; SpO2, transcutaneous oxygen saturation.